Concentrated HCl is 37.2% w/w HCl (±0.5% w/w) and has a density of 1.19 g/mL (±0.01 g/mL). Suppose that you need to dispense 0.0500 mol of HCl with an uncertainty of no more than ±2% (that is, an uncertainty of ±0.00100 mol HCl). What volume of HCl do you need and what is the maximum allowable uncertainty in this volume? Will you be able to use a digital pipet to dispense this volume with the desired uncertainty? Explain.
Uncertainity in Dispensing a Reagent
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David Harvey
Professor of Chemistry & Biochemistry at DePauw University
David T. Harvey is a Professor Emeritus of Chemistry and Biochemistry at DePauw University in Greencastle, Indiana, where he has been a dedicated faculty member since 1986. Over his nearly four-decade career, Dr…
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